Diagnostic Messages For Sm 336; Ai 6 X 13 Bit - Siemens S7-300 Installation And Operating Manual

Discrepancy analysis for fail-safe analog input modules
If you have configured safety mode in accordance with SIL 3, you can configure a
discrepancy time and an absolute tolerance window (as a % of the 4 mA to 20 mA
measuring range) for each input of the analog input module. In addition, configure the
standard value (MIN = lower value / MAX = higher value) to be applied and transferred to the
F-CPU.
If the difference between the two measured values is outside of the tolerance window for
longer than the configured discrepancy time, this error is signaled and the fail-safe value
(7FFF
the safety program in place of 7FFF
9.2.10

Diagnostic Messages for SM 336; AI 6 x 13 Bit

Possible diagnostic messages
The following table provides an overview of the diagnostic messages for
SM 336; AI 6 x 13Bit.
Diagnostic messages are assigned either to a channel or to the entire module. Some
diagnostic messages occur only in certain applications.
Table 9- 11
Wire break
Discrepancy error
Common mode fault
Overflow or underflow of the measured
value (see "Wire break and underflow") in
Chapter " Analog value representation
(Page 182) ")
Incorrect module parameters
Parameter assignment error (with
specification of consecutive number)
ADC/DAC error
No external auxiliary voltage
Communications error (CPU in Stop)
Time monitoring activated (watchdog)
EPROM / RAM fault
Processor failure
CRC signature error
Timeout of safety message frame
monitoring
Message frame error
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
S7 Distributed Safety
) is transferred. In
H
Diagnostic messages of SM 336; AI 6 x 13Bit
Diagnostic message
, the fail-safe value 0 is provided in the PII for
.
H
Signaled in the
application
1, 2, 3, 4, 5, 6
4, 6
1, 2, 3, 4, 5, 6
1, 2, 3, 4, 5, 6
1, 2, 3, 4, 5, 6
3, 4, 5, 6
1, 2
Analog modules
9.2 SM 336; AI 6 x 13 Bit
Effective
range of
diagnostics
A, B Channel
A, B, C
Channel
A, B, C
A, B, C module
A, B, C
Assignabl
e
Yes
No
215